lists = [[]] * 3
print lists

lists[0].append(3)
print lists

strs = [''] * 3

print strs

strs[0] += '123'

print strs

lists = [{}] * 2
print lists

lists[0]['1'] = 123
print lists

lists[0] = {'2':123}
print lists

a = [1,2]

b = [a]

b[0][0] = 2
print a


lists = [{} for i in range(3)]
lists[0]['1'] = '123'
print lists
